Skid for mining-machines.



G. DOBSON.

SKID FOR MINING MACHINES. APPucAnou man APILBO. 1918.

Patented Mar. 5, 1919.

2 SHEETS--SHEET 1.

G. DOBSON.

SKID FOR MINING MACHINES.

AP PLICATION FILED APR-'30. 1918.

Paton ted Mar. 25, 1919.

2 SHEETS-SHEET 2.

A M n M 6 A m w I l 10 5 1 6 Q x 2 v I k? w 2 3 I H F a v 1 W Wlllfi H \l v E J 2 M RUE a I N 'rr s rn r' 1 PATENT ()FFEC.

SKID FOR DIIN'ING-MACHINES.

To all whom it may concern:

Be it known that I, GEORGE DoBsoN, a citizen of the United States, residing at Palisades, in the county of Mesa, State of Colorado, have invented certain new and useful Improvements in Skids for Mining-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to a skid or runner, and more particularly to the class of adjusta ble skid attachments for coal cutting or mining machines.

The primary object of the invention is the provision of a skid of this character, wherein the same can be readily placed crosswise of the under frame of a coal cutting machine, such for example as that type known in the trade as the Goodman short wall mining machine, to enable the same to traverse a working place and to avoid any obstructions or obstacles which frequently happen to be in the way of the path of movement of the machine, such as boulders rising out of the working surface or floor in the mine, and particularly should the floor be of soft or cla formation.

nother object of the invention is the provision of a skid of this character wherein the coal cutting machine can be readily raised or loweredrelative thereto to properly adjust the same for preventing the cutter bits thereof from going into the floor in the mine and especially when cutting in a pitchin vein, and also eliminating the necessity of acketing the machine for lifting the same over an obstruction or obstacle.

:A further object of the invention is the provision of a skid of this character, wherein the cutting operation by the coal cutting machine can be executed with despatch, as all conditions ordinarily met with to obstruct the travel of the machine and the perfect working thereof will be overcome, the construction of this skid and the attachment thereof to the machine being of novel form to assure the positive and successful operation of said machine A still further object of the invention is the provision of a skid of this character whichis comparatively simple in construction, readily and easily applied to a coal cutting machine, easily adjustable, thoroughly Specification of Letters Patent.

Application filed April 30, 1918.

Patented Mar. 25, 1919.

Serial No. 231,721.

reliable and efficient in its purpose, strong, durable and inexpensive to manufacture.

Other objects will be in part obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction and arrangement of elements, the construction of which will be exemplified in the description hereinafter set forth and illustrated in the accompanying drawings, and the scope of the application of which will be indicated in the annexed claims.

In the accompanying drawings Figure 1 is a side elevation of a coal cutting machine in sumping position, showing the skid constructed in accordance with the invention applied thereto.

Fig. 2 is a fragmentary top plan view.

Fig. 3 is a rear elevation.

Fig. 4 is an enlarged vertical longitudinal sectional view through the skid taken through a part of the under frame of the machine.

Fig. 5 is a perspective view of the skid per 86. v

Fig. 6 is a detail plan view of the bracket for the skid detached from the under frame of the machine and looking toward the under face of the upper flange of said bracket.

Fig. 7 is a sectional view on the line 77 of Fig. 6.

Fig. 8 is a fragmentary elevation of the skid showing its relation to the bracket and the key engaged with its adjusting screw for turnin the latter.

Simfiar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, A designates generally the coal cutting machine and B its under frame having mounted on one of'its side sills or beams C the bracket for the skid, both being hereinafter fully described.

The bracket comprises an angle iron forming the vertical plate 10 and the horizontal plate 11 constituting angle flanges at right angles to each other. The vertical plate 10 is of less length than the horizontal plate 11 which is rounded as at 12 at one end, the vertical plate 10 being cutaway at opposite ends as;at 13 and 14 and the end thereof at the cutaway portion 13 is beveled at 15 so as to avoid chafing of the steel cable of the coal ner presently described.

cutting machine when the bracket is mounted on the under frame B thereof in a man- The horizontal plate 11 of the bracket is formed with suit able holes 16 near the ends thereof for the fastening of the'brac'ket in place.

The bolts 17 connecting under frame B to I these bolts 17 securely fasten the said bracket in'position on the under frame of the mafully described.

chine for the use of the skid hereinafter The s'kid'comprises a fiat plate 18 which is of the required length and width, preferably made from'steel and constitutes a runner to-bedisposed crosswise beneath the under frame B of the machine A and is formed with an upwardly curled toe end 19,

'whilespaced from this end and integral with or suitably secured to the plate 18 at its upper side is an L-shaped upright or support .20 which rises above the runner the rerequired distance and is formed with a side bearing 21 near its .upper end in which is threaded an adjustable jack screw '22 formed with a hexagonally shaped head 23 on which .3 adapted to seat the'ho'rizontal platen of the bracket on the under frame B of the machine. The head 23 of the screw 22 is formed with a series of holes 24 to receive a "pin or tool 25 constituting a lever for turning the screw to adjust the same in the bearing, the pin or'tool being readily 'insertible.

in any of the holes and is removable therefrom. r I

On the under face of the plate ll of the bracket are fixed diagonally disposedstop ribs or abutments 26 which are spaced apart the required distance and with which enga'gesthe head 23 of the jack screw 22 when the skid is in position beneath'themachine for use therewith. When the head 23 of the jack screw 22 is in engagement with any one of the abutments 26 and the machine A is in motion the skid will be prevented from working along the side sill or beam C of the under "frame B for the displacementofthe skid when the machine is cutting across the face of the coal and the skid is sliding upon the'working surfacejbed or floor of the mine. In other wordsvthese ribs or abutments p26 on the bracket will hold the skid in proper position relative to the machine A to I avoid displacement of said skid when traveling over the workingplaceor floor in the mine during the cutting operationofthe machine. The machine A can beraised and lowered by adjusting the jackscrew 22 relative to the skid so that when the machine is crossing'a working place in its cutting operation it will pass over any obstacles or obstructions and thereby eliminate the use of lifting jacks -or the cleaning of the way of the ma-- chine which requires labor, as well as it re tards the operation of the machinefor'the cutting of'the coal with despatch.

From the foregoing it is thought that the' 1. A skid of the character described, come prising a runner, means for: securing it to the-under frame of a'coalmlnlng machine,

and raising and lowering means onthe runner and engaged with the securing means-to operatively hold the: runner beneath themachine and topermit the raising and lowering of the latter relative tosaid runner.

2. A skid of the character described,'com-.

prising a runner, means for securing it to the under frame of a coal mining machine,

and'en'gaged with the securingmeanstooperatively hold the runner beneath tl l'e machine and to permit the raisingand lowering 51 of the latterrelative tosaid runner,*and

means on'the securing means and'forming an abutment for the rals'ing and lowering meanS'tO-preVent displacement of the 5 runner.- 1 p r 3. The combinatlon Wltll a coal cutting machlne having an under frame, of a bracket fixed to one side of the under frame and hav ing a horizontal flange plate,'a runner disposed beneath the under frame, an upright on the runner, a jack screw vert1ca1ly-'*supported on the upright and engageable With the flange plate, and an" abutment on the. V

flange plate for the j ack screw.

raising and lowering means onth'e runner- 4. The combination with a coal cutting machine having an under-frame, of a bracket fixed to one 'side of the under fra .-1r 1ejandl having a horizontal flange. plate, a runner L disposed'beneath the under frame, an upright on the runner, a jackscrew vertically supported 'on theupright and engageable with the flange plate, an abutment on; the'flange plate for the 'jack'screW, and an upwardly curled toe on' -the advancing end of the runner. I

In testimony whereof, I aflix signa- GEORGE DOBSON. "5

ture-,'i n'the presence of twowitnesses.

-Witnes sesf V VIRGIL L. MARS EN;

WILLIAM D. STo Es.

cuties or this patnt y be obtained for? five cents each, by addressing as ;Com missionerfofPatents, a 'Washington,D.C... 2 

